OTRC: Angelina Jolie makes first public appearance since mastectomy reveal

Angelina Jolie (L) and Brad Pitt attend the World Premiere of 'World War Z' at The Empire Cinema Leicester Square on June 2, 2013 in London. It marked Jolie's first public appearance since she revealed in May that she had undergone a double mastectomy. (Dave M. Benett / WireImage for Paramount)

Angelina Jolie joined fiance Brad Pitt at the London premiere of his newest film, "World War Z," marking her first public appearance since she revealed last month that she had undergone a double mastectomy as a preventative measure against breast cancer.

"I feel great, I feel wonderful and I'm very, very grateful for all the support -- it's meant a lot to me," Jolie told BBC News at the "World War Z" premiere.

The actress' mother, Marcheline Bertrand, died in 2007 at age 56 after battling breast cancer and ovarian cancer. Jolie's aunt, Debbie Martin, died of breast cancer at age 61 in late May. The actress had tested positive for the BRCA1 gene, which carried an 87 percent risk of contracting breast cancer. Her physician said last month that the actress underwent a double mastectomy in February and reconstructive cosmetic surgery on her chest in April.

"He's been extraordinary, just extraordinary. He's just a wonderful man and a wonderful father and I'm very lucky," Jolie said at the premiere.

"I'm very happy just to see the discussion about women's health expanded and that means the world to me and after losing my mom to these issues," she added.

Pitt told BBC News that Jolie is a "very special woman."

"The beautiful thing is that for us, life will go on," he said. "Very moving experience -- certainly brought our family tighter together. Just the bravest thing to me. I get a little emotional about because of just the act itself -- which she did for our family -- and then bringing, telling the story to others and what it means to others really surprised me."

"World War Z" is set for release on June 21. Watch a trailer and a sneak peek clip below.